Home / 419,904,472.40-629,856,708.60-215,831,128.40

Finding the Fourth Proportional to 419,904,472.40, 629,856,708.60 and 215,831,128.40

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Solution

The fourth proportional to 419,904,472.40, 629,856,708.60 and 215,831,128.40 is: 323,746,692.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,904,472.40 : 629,856,708.60 = 215,831,128.40 : x
  2. Step 2: Convert to fraction form
    419,904,472.40/629,856,708.60 = 215,831,128.40/x
  3. Step 3: Cross multiply
    419,904,472.40x = 629,856,708.60 × 215,831,128.40
  4. Step 4: Simplify right side
    419,904,472.40x = 135,942,684,147,448,000
  5. Step 5: Solve for x
    x = 135,942,684,147,448,000/419,904,472.40
  6. Step 6: Final answer
    x = 323,746,692.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.